Screw-propeller.



No. 864,484. PATENT-ED AUG. 27, 1907. F. w. ORDING. SCREW PROPELLER.

APPLICATION FILED DEG. 8,1906. u

my E S S E N H W UNITED (STATES PATENT OFFICE.

FREDERICK W. ORDING, OF JERSEY CITY, NEW JERSEY, ASSIGNOR OF ONE-HALF TOEMIL HIGGINS, OF- NEW YORK, N. Y.

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Specification of Letters Patent.

Patented Aug. 27, 1907.

Application filed December 8,1906. sol-a1 No. 848,873.

To all whom it may concern:

Be it known that I, Fnnnnnrcx W. Onomo, a citi zen of the .UnitedStates, residing at Jersey City, in the county of Hudson and State ofNew Jersey, have invented certain new and useful Improvements inScrew-Propellers, of which the following is a specification. i a

The primary object of my invention is toincrease .the efficiency ofscrew propellers for marine propulsion without a corresponding increaseof the power required to operate them. I

Numerous other advantages accrue from its use some of which are setforth in the specification.

I attain my objectin the manner illustrated inthe accompanying. drawingin which typical propeller blades embodying my invention are shown.

Figure 1 is a face view of one form. of my improved propeller; Fig. 2 aview partly in section, of a modification of the structure of Fig. 1;Figs. 3 and 4 views partly in section' of structural modifications of myimproved propeller and Figs. 5 and 6 are sectional views of furtherstructural modifications.

The propeller blade maybe of any suitable or desired size, shape,material or coristmction and 1 form -interior 4 of the blade 3. Thispassage is preferably closed at its outer end as shown 2. In practice a'hollow shaft is used on account of its strength and lightness. Thishollow blade 3 is provided with an outlet or outlets preferably on oneof its faces. These outlets may be of any desired form, number orarrangement. I show a single crescent opening 5 in Fig. 2 and theplurality of circular apertures 6 in Fig.

' 1. These apertures may. be protected by a lip 7 to amist in thepumping action. As shown in 3 the blade is cast around the pipes 8having outlets on the face-of the blade and inlets at the hub.

In 4 the fluid passages are cast inthe blade and extend from the hollowhub to one face.

InFig. 5channelsare castin the blade andth pipes laid therein.

InFig. 6channels10arecastinthefaceand the cover plate 9 issecuredthereover.

In operation the fluid passage 2 of the shaft l is connected with anysource of fluid supply. Ina boat an intake pipe would be run out at thebow and carried through the condenser of a steam engineer the cooler ofa gas engine. thence to the passage 2. On revolving the shaft andpropeller in either direction fluid is drawn at the bow therebyassistirigto relieve bow pressure, circulates through the condenserorcooler and finally is discharged through the opening or openings in theblade where it tends to relieve or decrease the vacuum ordinarily causedby the rapid rotation of the screw propeller. If desired a small turbinefor power purposes may be installed along the pipe line I claim 1. Ascrew propeller blade having a fluid passage therein provided with anoutlet in one face thereof and slip on the face of the blade adjacent tothe outlet.

2. A screw propeller blade having a plurality of fluid passages thereineach of which is provided withun outlet in the face of the blade and'alip on the face ot the blade adjacent to the outlet.

3. A hollow screw propeller blade having an outlet in the face thereofand a lip on the face of the blade adjacent to the outlet.

4. A hollow screw propeller blade having a plurality of outlets in theface thereof and lip's'on the face of the blade adjacent to each of saidoutlets.

5. A screw propeller comprising a hollow shaft closed at the outer end,a plurslityof hollow blades thereon in open communication with theinterior of the shaft, outlets in the faces of the blades and lips onthe faces of the blades adjacent to the outlets. I 4

In testimony whereof lhave aflixed my signature in presence of. twowitnesses.

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Witnesses CONRAD Dunn, Bos'r. B. 'KILIJGOBI.

